Fatal error: Uncaught Error: Call to undefined function wp_get_upload_dir() in /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-content/plugins/onecom-themes-plugins/modules/health-monitor/classes/class-onecom-check-files.php:12
Stack trace:
#0 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-content/plugins/onecom-themes-plugins/modules/health-monitor/classes/class-onecom-health-monitor-ajax.php(18): OnecomCheckFiles->__construct()
#1 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-content/plugins/onecom-themes-plugins/modules/health-monitor/health-monitor.php(38): OnecomHealthMonitorAjax->__construct()
#2 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-content/plugins/onecom-themes-plugins/onecom-themes-plugins.php(660): require_once('/customers/9/2/...')
#3 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-settings.php(254): include_once('/customers/9/2/...')
#4 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-config.php(96): require_once('/customers/9/2/...')
#5 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-load.php(37): require_once('/customers/9/2/...')
#6 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-blog-header.php(12): require_once('/customers/9/2/...')
#7 /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/index.php(17): require('/customers/9/2/...')
#8 {main}
  thrown in /customers/9/2/c/bpp-bundesverband.de/httpd.www/home/wp-content/plugins/onecom-themes-plugins/modules/health-monitor/classes/class-onecom-check-files.php on line 12